Battery Management Isolation Unit for Mobile Terminals
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Solution Overview
Problem
Connecting multiple batteries in parallel for mobile terminals poses safety hazards due to voltage differences, leading to backward current flow and difficulties in seamless switching between batteries without interrupting power supply.
Innovation Solution
A battery management device with an isolation unit, such as ideal diode circuits, that communicates with the power supply management circuit to block backward current flow between batteries, ensuring safe and continuous power supply by isolating discharged batteries and allowing only high-voltage batteries to connect with the power management circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If multiple batteries are connected in parallel to increase battery capacity, then the battery life and power supply capacity are improved, but voltage differences between batteries cause backward current flow from high-voltage to low-voltage batteries, creating safety hazards
Solution Approach 1:
An isolation unit is introduced as an intermediary component between multiple batteries. This isolation unit includes isolation circuits that selectively connect or disconnect batteries based on voltage levels, preventing direct parallel connection of batteries with different voltages and thus blocking backward current flow while still enabling multi-battery operation
Solution Approach 2:
The isolation unit dynamically adjusts the connection state of each battery based on real-time voltage detection. When voltage differences exceed a threshold, the isolation circuit automatically disconnects the low-voltage battery from the parallel connection, preventing backward current flow and safety hazards while maintaining flexible power supply
2Quantity of substance
If multiple batteries are connected in parallel to maximize battery capacity, then the power supply capacity is improved, but the circuit design becomes more complex due to the need for isolation units and voltage management
Solution Approach 1:
The isolation unit serves multiple functions simultaneously: it blocks backward current flow, manages voltage differences, enables seamless battery switching, and provides protection against safety hazards. By consolidating these functions into a single integrated unit, the overall circuit complexity is reduced despite the multi-battery configuration
3Device complexity
If batteries are directly connected in parallel without isolation, then the circuit design is simplified, but current flows backward from high-voltage to low-voltage batteries causing safety hazards and reducing system reliability
Solution Approach 1:
The isolation unit acts as a mediator between batteries with different voltages, using isolation circuits to control current flow direction. This prevents direct harmful interaction between batteries while maintaining a relatively simple overall circuit structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents backward current flow, maximizes battery capacity without increasing safety risks, prolongs battery life, and simplifies circuit design, allowing for efficient power distribution and utilization of internal space in mobile terminals.
Implementation Method 1
the isolation unit is configured to communicate one or more of the batteries with the power supply management circuit and block the backward flow of current between batteries
Data Source
AI summary
A battery management device and a mobile terminal are disclosed. The battery management device includes: a charging unit; a battery unit including at least two batteries; a power supply management circuit; and an isolation unit configured to communicate one or more of the batteries with the power supply management circuit and block the backward flow of current between batteries. The charging unit, the battery unit, the isolation unit and the power supply management circuit are successively connected.